Hydrological Simulation Program - Fortran User's Manual for Release 11

Abstract

The Hydrological Simulation Program - FORTRAN (HSPF) is a set of computer codes that can simulate the hydrologic, and associated water quality, processes on pervious and impervious land surfaces and in streams and well-mixed impoundments. The manual discusses the structure of the system, and presents a detailed discussion of the algorithms used to simulate various water quantity and quality processes. It also contains all of the information necessary to develop input files for applying the program, including descriptions of program options, parameter definitions, and detailed input formatting data. The original version of this report was submitted in fulfillment of Grant No. R804971-01 by Hydrocomp, Inc., under the sponsorship of the U.S. Environmental Protection Agency. That work was completed in January 1980. Extensive revisions, modifications, and corrections to the original report and the HSPF code were performed by Anderson-Nichols and Co. under Contract No. 68-03-2895, also sponsored by the U.S. EPA. That work was completed in January 1981. Versions 7 and 8 of HSPF and the corresponding documents were prepared by Linsley, Kraeger Associates, Ltd. and Anderson-Nichols under Contract No. 68-01-6207, the HSPF maintenance and user support activities directed by the U.S. EPA laboratory in Athens, GA. The HSPF User's Manual for Versions 10 and 11 were prepared by AQUA TERRA Consultants of Mountain View, CA, incorporating code modifications, corrections, and documentation of algorithm enhancements sponsored by the U.S. Geological Survey, the U.S. EPA Chesapeake Bay Program, the U.S. Army Corps of Engineers, and the U.S. EPA Athens Environmental Reasearch Laboratory. The Version 11 manual and code were prepared under sponsorship of the U.S. Geological Survey under Contract No. 14-08-0001-23472. The manual is available in WordPerfect format.